<template>
  <el-upload class="avatar-uploader" action="" :show-file-list="false" :before-upload="beforeAvatarUpload">
    <!-- (自动上传)action是上传地址 人资项目不需要 人资项目(手动上传)  -->
    <!-- show-file-list不展示列表 -->
    <img v-if="value" :src="value" class="avatar" />
    <i v-else class="el-icon-plus avatar-uploader-icon" ></i>
  </el-upload>
</template>

<script>
export default {
  props: {
    value: String,
    default: ''
  },
  methods: {
    beforeAvatarUpload(file){
      // jpeg png gif bmp
      // 图片格式限制
      // 文件大小限制
      const isJPG = ['image/jpeg', 'image/png', 'image/gif', 'image/bmp'].includes(file.type)
      const isLt2M = file.size / 1024 / 1024 < 5 // 5M

      if (!isJPG) {
        this.$message.error('上传头像图片只能是 JPG PNG GIF BMP 格式!')
      }
      if (!isLt2M) {
        this.$message.error('上传头像图片大小不能超过 5MB!')
      }
      return isJPG && isLt2M
    }

  },
  mounted() {
    console.log(this.value)
  }
}
</script>

<style scoped lang="scss">
.avatar-uploader .el-upload {
  border: 1px dashed #d9d9d9;
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.avatar-uploader .el-upload:hover {
  border-color: #409eff;
}
.avatar-uploader-icon {
  font-size: 28px;
    color: #8c939d;
    width: 178px;
    height: 178px;
    line-height: 178px;
    text-align: center;
}
.avatar {
  width: 178px;
  height: 178px;
  display: block;
}
</style>
